Here is an example. I had downloaded the global data last September, with numbers updated through August. Just now, I downloaded the current data with the numbers through December, completing both the meteorological and calendar years. Here is a chart of the monthly differences between the two data sets for the last 17 years Beware. This data will change every time they get new data and recalculate. The chart shown was from data downloaded at 1 PM eastern time on January 18th, 2015, today. It is different from the data I downloaded last Friday. The changes are small, but they are nearly all in one direction, warmer. One would think that data corrections would be in both directions, some warmer, some cooler, but in the last 17 years, a total of 200 months, only three months were corrected in the cooler direction. Note that in the last year the corrections were mostly in the warmer direction by .02° or more. Only one, August in the September update, was cooled. It was completely offset by the July change. All the changes in the first six months of 2014 were sufficient to make 2014 the warmest calendar year. - See more at:
NoTricksZone Not here to worship what is known but to question it 8211 Jacob Bronowski. Climate news from Germany in English 8211 by Pierre L. Gosselin